Show that `sqrt(3)\ cos e c\ 20^0-sec20^0=4.`

Explanation

To show that \( \sqrt{3} \csc 20^\circ - \sec 20^\circ = 4 \), we will go through the following steps:

### Step 1: Rewrite the trigonometric functions
We start by rewriting the cosecant and secant functions in terms of sine and cosine:
\[ \csc 20^\circ = \frac{1}{\sin 20^\circ}, \quad \sec 20^\circ = \frac{1}{\cos 20^\circ} \]
Thus, we can rewrite the expression:
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